you some selected excerpts from the 911 call from the day that adam lanza killed 20 children and six educators at sandy hook elementary school. this will be the first time you will hear these tapes on cnn. i can tell you we came to this decision after hours of discussion and consideration of the context of the news. afterwards, we'll hear from a former congressman who had been tasked with finding a way to better protect our children. but first, this report from deborah. we should warn you, what you're about to hear could be disturbing. >> reporter: the first call came from the school secretary moments after class started. it gives insight into how quickly adam lanza was able to get into the secured building. >> what's the location of the emergency? >> i think there is somebody shooting in here. in sandy hook school. >> what makes you think that? >> because somebody has a gun. i saw glimpse of somebody running down hallway. they're still running. they're still shooting. sandy hook school please. >> seven 911 calls were released. they captured the fear and quiet urgency and lack of panic of thos